Loom



Patented Au 2, 1921.

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J. C. BROOKS.

LOOM.

APPLICATION FILED APR.23| 1919.

. J. C. BRO0KS.

LOOM.

APPLICATION FILED APR.23,1919.

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' \nveni'or. --..John C. BrooKs by Mif Patel'lted Aug. 2, 1921 PATENTOFFICE.

JOHN c. nooks, or ra'rnason, new masmr.

l LOOK.

To all whom it may concern:

Be it known that I, J OHN C. Bnooxs a citizen of the United States,residin at Paterson, county of Passaic, State ofew Jersey, have inventeda new and'usefut Improvement in Looms, of which the followingdescription, with the following drawings, is a specification, similarcharacters on the drawing s representing similar parts.

- he present invention relates particularly to looms of that type whichare constructed todeliver the filling into the warp-sheds by means of anair blast acting directly on the filling.

I have shown a loom of this type in my Patent No. 1096283, dated' May12, 1914, and also in an application filed by me October 2, 1918, Se.No. 256,589.

In the device illustrated in the above-mentioned patent a fillingmeasuring lever is emplo ed, which draws off or measures a length offilling suitable for each pick, and the arrangement is such thatthe-filling is under the constant restraint of said lever while it isbeing blown into the Warp-sheds.

In the device illustrated in my above-mentioned application Se, No.256,589 the filling is drawn off from the source of supply and measuredfor each pick by means of feeding rolls, and the air blast arrangementis such as to act on the filling as fast as it is drawn oil by the saidrolls.

While both of these constructions are fully practicable, yet I havefound that there are some advantages resulting from using a short quickblast of air, in the nature of a puff, for blowing the filling into thewarpsheds, and when this method of placing the fillin is employed it isdesirable that the lengtli of filling for each pick should be free fromrestraint when it is acted on b theair blast so that it can be i uicklyand instantly blown into position. hese features are especiallyadvantageous when wide fabrics are bein made and when the loom isoperating rapidly.

Accordingly one feature of my present invention contem lates theprovision of means for drawing 0 a length of filling suitable for eachpick and then releasing said length so that it is free from restraintwhile it is being blown into the warp-sheds, and another feature of theinvention contemplates the provision of means for producing anddelivering a short quick blast of air after the Specification of LettersPatent.

Patented Aug. 2, 1921.

Application fled April 28, 1919- Serial Io. 292,121.

length of filling thread has been released, thereby to blow said lengthinto' the warpsheds.

I have found from practice that if the length of filling for each pickis perfectly free from restraint a short quick blast of air of lowvolume and pressure will blow'the filling a considerable distance andwill 0 erate better for laying the filling than a ong blast of air underhi h pressure.

Where a short qulck blast of air of low volume and pressure is used andthe weaving is done with a filling thread of continuous length by layingdouble picks it sometimes happens that the portion of the filling leadmgfrom the edge of the cloth to the air blast nozzle will remain loose,thus not binding.

the 'selvage sufficiently. To-eliminate this my present inventioncontemplates means to ositively insert the first portion of an entermgpick of filling, thus preventing any looseness at the selvage. In orderto give an understanding of my invention I have illustrated in thedrawings a selected embodiment thereof, after which the novel featureswill be pointed out in the appended claims.

Inasmuch as the invention relates simply to the manner of delivering thefilling thread into the warp-sheds I have not deemed it necessary toillustrate a complete loom, but have contented myself with showing asufiicient portion of the loom to enable my invention to be understood.

In the drawings Figure 1 is a front view of a portion of loom having myimprovement applied thereto, the breast beam. being olrlnitlted and saidfigure showing the front of t e ay.

Fig. 2 is a view showing the rear of the lay.

Fig. 3 is a fragmentary view showing the means for producing anddelivering the air blast and also the cam for actuating the fillinmeasuring device.

I igs. 4 and 5 are enlarged sectional views of Fig. 1.

Fi 6 is a more or less diagrammatic view showlng the manner ofpositively inserting the filling into the warp-shed.

Fig. 7 is a perspective view of one of the pulling-off members;

91 indicates a portion of the loom frame, 92 the usual lay which iscarried by the usual lay swords 1, 93 is the reed, 33 the reed-cap orhand-rail, and 76, 77 the harness frames. These parts are or may be allas usual in looms, and form no part of my present invention. The lay hasmounted thereon air blast nozzles through whichv the filling 56 isdelivered into the warp-sheds, said filling being taken from suitablesources of supply 57. In the construction shown I have illustrated aloom capable of weaving two webs simultaneously, and for this purposethe reed 93is divided into two sections and there are four air blastnozzles, one each side of each web of war threads. These air blastnozzles are indlcated 35, 35, 35", 35.

, These air blast nozzles are arranged in pairs,

with the nozzle of each pair directed toward each other and situated onthe opposite sides of a web of warp threads. The means for ing board 2,and they carry pulling-oil. elements 9. which are pivoted thereto at 14and which 0 erate in slots 3 formed in the supporting oard 2. There is apulling-off element 9 on each rod 6, 7 for each filling thread. Thesepulling-oil elements 9 are provided with hooks 10 adapted to engage thefilling thread, and are also formed at their ends with cam surfaces 11.The slots 3 in which the members 9 operate are provided at theirendswith blocks 31 having cam surfaces 32 which are ada ted to engage thecam surfaces 11 of the pullingoff elements 9 as the bars .6 or 7reciprocate,

and thereby swing said pullin -ofielements from the osition shown in ig.5 to that shown in ig. 4, and vice versa. The filling 7 threads 56extend from the supply 57 up through guide eyes 95 carried by thesuporting board 2, said filling threads passmg between said board andthe reciprocating bars 6 and .7.- The position of one of these fillingthreads is indicated in Fig. 4,

and it will be observed that in said figure the pulling-off member-9 hasbeen swung into such a position b its engagement with the cam surface 32t at the pin 10 is lo- Y cated behind said filling thread. Whentherefore the bar 6 moves to the left Fig. 4 into the position shown inFig. 5 the pin will engage the filling thread and will form a bight inthe latter between two of the guide eyes 95, thus drawing off a lengthof filling from the sup 1y. hen the bar 6 reaches the position s own inFig. 5 one end 11 of the pulling-off member 9 will engage the left-handcam face 32, thus swingin said member into the position shown in ig. 5and withdrawing the pin 10 from engagement with the filling thread,thereby releasing the latter. A spring 12 is emplo ed to yieldingly holdthe pulling-off mem er in either of these two positions. Since each bar6 and 7 has a pulling-off member for each filling thread it will followthat each time the two bars move to the left a double bight will beformed in the filling thread, as shown in Fig. 1, and the constructionis such that the amount of filling thus. ulled off from the supply 57 issufficient to extend twice across the .web of warp threads and therebyform a double pick. I will use two filling threads for each fabric, onefilling thread being inserted on one side of the fabric and the other onthe other side, and the that when the bars 6 and 7 move to the left intothe position shown in Fig. 1 the righthand pulling-off member 9 will acton the filling thread at the right-hand side of the web, thereby to drawoff the desired length of filling, and when the bars 6 and 7 move to theright the appropriate pulling-oil -pul1ing-oif members 9 are soconstructed cured thereto, which passes around a directiondpulley 19pivoted in a bracket 21 secure to the supporting board 2 and connectedto a lever 23 that is pivoted to the loom frame at 27 This lever has afollower portion-25 which is acted on by a cam 28 on the usual cam shaft30.

The bracket 16 has a similar flexible connection 18 secured theretowhich passes around a direction pulley 20 supported in a bracket 22,also secured to the supporting board 2, said connection leading to alever 24 which is acted on by'a cam 29 carried by thecam shaft. Thesecams 28 and 29 are oppositely disposed and act to move the levers 24 and23 downwardly alternately. By this means the bars 6 and 7 are giventheir reciprocating motion in timed relation with the other movements ofthe loom, and it will be observed that on the movement of the bars inone direction the filling thread 56 on'one side of the web of warpthreads will be ulled oil and then released, while during t e movementof the bars in the opposite direction the filling thread on the blowingeach length of filling into the warpsheds Just after it has beenreleased, this being done by delivering a blast of air through theappropriate nozzle 35, 35, 35",

35'. While any suitable means for developing and delivering the airblast may be employed, I have herein shown a construction in the form ofa pump which is actuated by the loom and which operates to develop acharge of compressed air and then to deliver it tothe appropriate nozzleat the proper time.

Secured to the loom frame on each side thereof is a pump 48, thecylinder of which has a pipe 53 connected thereto which is branched, thetwo branches" being indicated at 54, 55, leading to two of the nozzles.Thebranch 54 on one side of. the loom leads to the nozzle 35, and thebranch 55 leads to the nozzle 35". The branch 54 on the opposite side ofthe loom leads to the nozzle 35", while the branch 55 leads to thenozzle 35. The piston rod 47 for the piston of each ump is connected bya link 46 to a SWlIlging lever 43 which is pivoted to the loom frame at44. This swingin lever 43 has a link 41 ivoted'thereto at its lower endat 42, said ink being also pivotally connected to a crank pin on anelliptical gear 38 which is rotatably mounted on a stud 39 carried b theloom frame. This elliptical gear mes es with another elliptical car 37which is fast on the cam shaft 30. similar connection is provided foractuatin the piston in each pump. The cam shaft 30 makes one revolutionfor every two picks, and therefore each piston will be given itscompression stroke once for every two picks. Each pipe 53 has aself-closing valve 52 therein, which can be opened by upward movement ofa lever 60 pivoted to a suitable bracket 50. Each piston rod 47 has acam member 61 fast thereto which is arranged so that it will engage thelever 60 and raise the latter just before the piston reaches the end ofits compression stroke. In the operation of each pump, therefore, thepiston will be moved forwardly, thus compressing the air therein, andjust before the piston reaches the end of its compression stroke thevalve 52 will be opened automatically, allowing the compressed air to bedelivered through the pipe 53 and its branches'54, 55. The gearin fordriving the pumps is so arrange that the pumps work alternately, onepump operating for one pick and the other ump operating for the nextpick. Thereore at alternate picks the air blast will be deliveredthrough the nozzles 35, 35", and at the other picks the air blast willbe delivered through the nozzles 35', 35". It

pump-actuating mechanism is so timed that the air blast will bedelivered when the lay is on its back stroke.

- Where the filling is in the form of a con- .tinuous length as hereinshown each blast of airwill result in blowing a loop of filling pick. Inorder to insure that the filling will be laid tightly at the selvage Ipropose to employ means for positively introducing the first portion ofeach filling into the warp-sheds. ploying nozzle extensions whichtelescope over the air blast nozzles and are adapted to be projectedbeyond the same. These nozzle extensions are shown at 62, and each iscarried by a holder 64 slidably mounted on the nozzle. These holders areconnected to elbow levers 71 which are pivoted to the board 2 at 73. Thehorizontal arms of two of these elbow levers are connected by flexibleconnections 74 to the lower rail of the harness 76, and the horizontalarms of the other levers 71 are connectedto the lower rail of the otherharness 77 The upper ends of the levers are connected to the handrail 33by return springs 78. The two levers on one side of each web of warpsare connected to one harness frame and the other two levers connected tothe other harness frame, and with this arrangement it will be observedthat when any harness frame is lowered the levers connected thereto willbe turned thereby to move the nozzle extensions forwardly beyond thenozzles. In Fig. 1 the nozzle extensions on the right-hand of each webare shown as projected. When these nozzle extensions are thus projectedthey are introduced into the warp-shed as shown in Fig. 6, and b thisintroduction the entering portion of t e filling thread is positivelyintroduced into the wa -shed, and said thread is thus laid tig tlyagainst the selvage. When therefore the air blast is delivered the loopof filling will be thrown across the warp-shed and the filling will belaid to make a tight selvage.

It will be seen from the above that with my invention I draw off alength of filling and then release said length so that it is entirelyfree from restraint, after which said length is subjected to a quickshort blast of air of low volume which blows the filling into thewarpsheds in the form of a loop, thus making a double .pick. It will also be.seen that by using thenozzle extensions the portion of each fillingadjacent the-selvage that said filling is free from the restraint of thepulling-oil mechanism is a decided advantage because where a length offilling thread which has thus been pulled oif is into the warp-shed,thus laying a double This is accomplished by em- 65 will be understood,of course, that the free from restraint a short quick blast will 130.

efiectively blow the length of filling across the shed and it is notnecessary to use a continued air blast. v

I have found from practice that a short quick blast of air willefi'ectively blow an unrestrained length of filling across the shed andwill lay the filling properly in position.

While'I have illustrated herein a selected embodiment of my .invention,I do not wish to be limited to the constructional details shown.

"I claim: 1. In a loom of the type using an air blast to deliver weftthreads into the warp sheds, the combination with shed-formingmechanism,-of means to measure oil? a length of filling for each ick andthen to release saidlength so that t e end thereof is free fromrestraint, and pneumatic means to dehver the measured length to theshed' 2. In a loom of the type described, the combinationwithQshed-forming mechanism, of a filling delivery nozzle, means to drawoil from the source of sup ly a measured length of filling for leach ickand then to release said measured. lengt from the drawing-off means, andpneumatic means operative after the length is released to deliver saidlength through said nozzle and into the shed.

. 3. In a loom of'the type described, the

combination with means' to draw oif a measured length of filling from asource of supply, means to release the measured length so that it isfree from the restraint of the drawing-off means,and means to deliver. ablast of air transversely of the warp sheds thereby to blow saidmeasured length across the warp sheds.

4. In a loom, the combination with a nozzle through which filling isdelivered to the warp sheds from a source of supply, of means acting onthe filling between said nozzle and source of supply to draw off ameasured lengthof warp thread and then to release said length from thedrawing-oil means, and pneumatic means to deliver said measured lengthfrom said nozzle after it is thus released.

5. In aloom, the combination with a filling delivery nozzle throughwhich filling is delivered from a source of supply, a device actin onthe filling between the nozzle and supp y to draw off from the supply ameasured length of filling, means to-' disengage said device from thefilling when said measured length has been drawn'ofi, and pneumaticmeanst'o deliver said length through the nozz -to the warp sheds.

6.111 a loom of the'class described, the

combination with a lay, of a filling delivery nozzle mounted thereon andprovided intermediate of its ends with an aperture through which fillingis delivered, means actin on the filling in the rear of the nozzle to wofi a measured length from the source of supply and then to release saidlength, and means to deliver a blast of air through said nozzle therebyto blow said measured length across the warp sheds.

7. Ina loom, the combination with a fillmg delivery nozzle, of means todeliver an air blast through said nozzle movable into and out from thewa shed thereby to blow a filling therefrom through the warp sheds, andmeans to pro'ect the nozzles into the warp sheds at the tlme the fillingis delivered therefrom.

8. In a loom, the combination with a filling delivery nozzle, of meansto draw ofi from a source of supply a measured length of filling, andmeans actuated by the loom to deliver an air blast to said nozzle afterthe measured length of filling has been drawn off from the source ofsupply thereby to blow said filling from said nozzle through the warpsheds.

9. In a loom, the combination with 'a filling delivery nozzle adapted todeliver filling from a source of supply to the warp shed,

means to draw oil? a length of filling from v the source of supply, acylinder connected to said nozzle, a piston in the cylinder, connectionsbetween said piston and the loom -mechanisin by which the piston isactuated to place air under compression in said cylinder, a valvecontrolling the delivery of air from the cylinder to the nozzle, andmeans to open said valve as soon as the measured length of filling hasbeen drawn off.

10. In a loom, the combination with shedforming mechanism, of means todraw ofi from a source of supply a length of filling suflicient for adouble pick and then to release said length so that it is free fromrestraint, and means to cause a blast of air to act directly on saidlength thereby to form ahltop therein and blow it into the warp s e s.

11. In a loom, the combination with means

